Open source online whiteboard/sketch tool with hand-drawn look and live collaboration
A canvas based drawing app that you can integrate easily on your website
https://github.com/Leimi/drawingboard.js
You'll feel like a superhero
Zoomable online whiteboard for collaboration on any desktop or mobile device. Explain, sketch, teach anything, anywhere with others in real time.
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Scribblar is a collaboration tool that is perfect for online tutoring and real-time collaboration and used by thousands of teachers, students and schools in over 25 countries. Give it a try today. Scribblar - simple, effective online collaboration.